XMeters

XMeters taskbar system monitoring for Windows.

Displays customizable stats:

Available RAM
Disk usage
CPU usage
Network usage Free version refreshes the stats every 3 seconds, paid version can be set to be faster.

GeekTool

GeekTool is an application for Mac OS 10.6+. It lets you display various kinds of information on your desktop via 3 default pl ...

SidebarDiagnostics - A simple sidebar for Windows desktop that displays hardware diagnostic information. Features: Monitors CP ...

This is a port to OS X El Capitan 10.11 of MenuMeters by Alex Harper. MenuMeters is a set of CPU, memory, disk, and network mo ...

Rainmeter is a desktop customization platform. Through Rainmeter, you can enhance your Windows computer at home or work with s ...

iStat is a series of system monitor apps. It's available in different versions: iStat Menus, iStat for iOS and iStat Server as ...